NCLEX RN Predictor Exam Related

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Digestion, elimination, and ___________ are the three functions of the digestive system.

  • A. constriction
  • B. relaxation
  • C. absorption
  • D. peristalsis
Correct Answer: C

Rationale: The correct answer is 'absorption.' The three main functions of the digestive system are digestion, absorption, and elimination. Absorption refers to the process of absorbing nutrients and other substances from the digested food into the bloodstream. Choices A, B, and D are incorrect: Constriction is not a primary function of the digestive system, relaxation is not a distinct function in this context, and peristalsis is a muscular movement that aids in digestion but is not one of the three main functions of the digestive system.